Multiple exposure device for cameras



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Feb.. 25, 1930.

Patented Feb. 25, 1930 WILLIAM A. WADE,

MULTIPLE EXPOSURE Application led May 22,

@PATENT "enema i928. serialfnaevass.

This invention relates to multiple exposure son the planeffindicatedi'aby the #il-ine 12f+2-o`f attachments for plate cameras, and has for its primary obj ect the provision of simple and improved means carried by the removable plate holder of such a camera for permittmg a plurality of exposures to be made on a single plate.

Multiple exposure devices of this kind have been employed for some time in connection with plate cameras. In most of the constructions ordinarily employed, however, the controlling shutter is removably mounted upon the inside of the plate holder, with the result that it is necessary to completely detach the plate holder or the back of the camera from the camera casing in order to obtain access to the shutter to eect its position.

It is primarily the object of the invention to provide a camera of this type with means by use of which the shutter may have its cffective positions adjusted by the provision of actuating mechanism which may be operated from the exterior of the camera casing, thereby rendering it unnecessary to remove the plate holder or back from its applied position in connection with the rear portion of the camera casing. This feature facilitates the operation of taking multiple exposures, provides for greater convenience in operation and permits of the performance of the operation in less time than is required by previous constructions.

Another object of the invention resides in the provision of the pivotally lmounted shutter which functions to control of itself the taking of two or more exposures, the shutter being pivotally mounted in the center of the camera so that it may be swung from one side to the other of the plate to cover or expose the desired plate areas.

For a further understanding of the invention reference is to be had to the following description and the accompanying drawing; i wherein,

Figure 1 is a vertical transverse sectional View taken through a camera casing, looking toward the back of the casing and showing the improved adjustable shutter in its operative position,

Figure 2 is a horizontal sectional View taken K Figure 1,

Figure 3 is a vertical sectionalviewjonia slightly enlarged scale taken @through fthe ax-islof-.mountingaands turning ,movement of La? :the .adj nstable-shutter,

:Figure 1L' isfa idetailedw-iew--- showing ai portion lof-Jthe shutter and itsI `actuating handle,

Referring .more particularly` to the.V fdraw- '.ingsfthenumeralf1=zdesignates lthe= casing -of .anlordinary plate type .of camera, ,the .nu- QmeralZ the'folding bellows of'thecamera and :the numeralaidesignates the-removable back ,165 ,oruplatehholder.- of Athe camera v"'Ihisplate -hol.der is ofi the-.usual ttypeand isaprov'ded :withal groove 4,.open at onelsi'de,to ,penmfitof the insertion .lof `the .customary Asensitized .plate .(-not:shown)b.in the holder.

f rllhediolder embodiesa substantially --rectangular frame 5 and the resiliently movable Jsection :6: which serves .to .clamp 4the sensitized -platelwlithin thehholden 1Carried (by.y the -frame15 is a. swingingxshutteror `divider'g5 In-` this instance the-shutter) comprisesa: sheet Y metal iframe .composedlof Ltelescopingllsec- .tions 8-andr 9, which 1Ais adjustable .to )conform. to: vthe-dimensions -o'fi theplate `opening LOprovidedinf theholder 3Q 'The.sectionsf81-S0 land-9 frictionailly-gripan opaquelwall l1 'so that .said wall will .swing 'inunison-:.with-vthe .sections Sand Qanfdyet will be firmly retained inthe coninesof theshutter. 'T-heouterfree .e Oeiof the wail1llamay'fbeprovided with a85 2 Tiexiible f material .-as Qin'dicatedsat i v`12,:.Which -closely' engages fwithf the inner wallsoff'the '.framefVV to :obstruct the light and'prevent its -iuxfdueapplication to: the.l sensitized. plate.

'In -orderxto mount: the: shutterffor -axialo i tunning movement,-the lower. section19 is .provided with a depending stud 18,.-which is receivedzwithinafsoeketlllfformed `in the lower barof the frame 5. fiTihe upper section 8 of theV shutter includes a flat stud or web 15 which*L90 is receivable within a slot 16 formed in the bottom of an angularly constructed actuating handle 17. This handle has its vertical portion journaled for rotation in a sleeve 18V which is situated in an opening extending vertically through the upper bar of the plate holder 3, and this vertical portion terminates in a horizontally bent arm which may be grasped by the operator so as t effect the 5 rotation for oscillation of the shutter 7.

In View of the foregoing it will be seen that with the. present vConstr,uctiuon Vthe divider plate -ors'h1ttery may be f oscillated to '.cover first one side and then the other of a sensitized lo plate carried by the holderY 3, andvthat this actuation can be accompaniedfrom the Vexterior part of the camera casing,lrendering it unnecessary to remove the'plte holder from the casing to effect the -adjustmentofA the; dt vider or shutter. Moreover, the shutter is of an: adjustable. Iconstruction: which' may be readily adapted to plate holders of varying ,.proportionsr Y v ,1':Vlhatisclaimedis: 1 z 1.y In a plate camera, a casing, aremovable back for the casing, said back beingiformed `to include a frame adaptedV forzthe .reception of asensitized plate, a swinging shutter provided for the multiple lexposure of a plate carried by said back, said ,shutter being formed'to comprise;a =vertically adjustable pair of telescopicssections, an lopaque 4Wall carried ,by vsaid sections, -said Wall I being of such proportions as to cover? substantially vthe l 3oA full areapof-fone halfof said frame when said vshutter s'positioned in one orthe other of' its ,operating positions, zmeansifor' r'pivotally mount-ing; the sectionscfs/ aid shutter in' connectionf with v said ,rame, and anr'exteriorly projecting operating frame fori effecting the rotation ofsaid shutter'exteriorly of saidfcasingwip i 2.l In` a-plate camera, a, casing, a removable backforlthe casing-,said backbeing-formed to 4.0A include a frame adapted -vfor the reception of Y a..sensitized.plate, a swinging-shutter pro-l vided for the` multiple exposure of the plate carried by saidback, said shutter being formed to comprise averticallyadjustable pair of telescopic sections, said sections being formed from sheet metal and adapted to providea groove therein, an opaque Wall slidably received and frictiona-lly, held within Y said groove, saidwall being of such propor- 50, tions astovcover substantially the full ,area of onehalf of said frame When said shutter is .positioned in-one or the other of its operating positions, means for pivotally mountingl the sections of said shutter in connection with said frame, and an exteriorly positioned operating handle for eecting the rotation of said shutter. f .f In testimony whereof I aix my signature. 6d v l f WILLIAM A. WADE. 

